Drilling-machine.



H. W. SCHATZ.

DRILLING MACHINE.

APPLICATION FILED ocr. 22. 1917.

1 ,297,257. Patented Mar. 11, 1919.

5 SHEETS-SHEET I H. W. S CHATZ.

DRILLING MACHINE.

APPLlCATlON men OCT. 22. 1911.

1,297,257. Y I Patented Mar. 11,1919

5 SHEETS-SHEET 2- v H. W. SCHATZ.

DRILLING MACHINE.

APPLICATION EILED 00122. 1911.

Patented Mar. 11,1919.

5 SHEEIS-SHEET 3.

H. W. SCHATZ.

DRILLING MACHINE.

APPLICATION FILED OCT. 22. 1911.

Patented Mar. 11,1919.

5 SHEETS-SHEET 4.

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nmume MACHINE.

APPLICATION FI LED OCT. 22. I917.

Patented Mar. 11,1919.

- TSTNITED STATES PATENT OFFICE.

HERMAN W. SCHATZ, OF NOBWOOD, OHIO, ASSIGNOR TO THE AMERICAN TOOL WORKSCOMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

DRILLING-MACHINE.

Specification of LettersPatent.

Patented Mar. 11, 1919.

Application filed October 22, 1917. Serial No. 197,888.

Toall whom it may concern:

Be it known that I, HERMAN W. ScHA'rz, a citizen of the United States,residing at Norwood, in the county of Hamilton and State of Ohio, haveinvented certain new and useful Improvementsin Drilling-Machines, ofwhich the following is a specification.

My invention is an improvement on the drilhng machine shown, describedand claimed in the application of applicant and Augustus M. Soss, foratent on improvements in drilling mac ines, filed 1n the United StatesPatent Oflice September 10, 1917, as Serial No. 190,653.

In this latter application a drilling machine is exemplified in which aninternal gear and an external gear are received about the spindle forrotating the same, a pair of driving gears being arranged to be placedin cooperative driving relation selectively with the internal gear andthe external gear about the spindle, and so arranged in one of theexemplifications of the invention that, assuming the driving gears to berotating in the same direction, when one of said driving gears isoperatively connected with the internal gear, the rotation of thespindle is in one direction, and when the other of the driving gears isin o rative connection with the external gear a out the spindle, therotation of the spmdle is in the opposite direction.

In practice it is customary for the operator to shift an operatinghandle for causing rotation of the drill-spindle in one direction whenfeeding the drill-spindle in its advancin or cutting axial movement, andto shift said handle in the opposite direction for a reverse rotationand feeding movement of the drill-spindle. I

If now the spindle is rotated in one direction when one of the drivinggears is in operative connection with the internal gear, and is rotatedin the opposite direction when the other of said driving gears is inoperative connection with the external gear about the spindle, it wouldbe necessary for the operator to remember or have in' mind which of thedriving gears is in o rative relation, in orderto know in which irectionto move the operating handle for a, given direction of rotation orfeeding movement. of the spindle. For a given rotation of the spindle itwould be necessary, when the above relasaid given advance rotation ofthe spindle,

when the other of said driving gears is in operative relation with theexternal gear about the spindle.

In order to avoid the incident annoyance and possible mistakes and themental calcu lations which are incident to such structure andarrangement, I have provided means, eifected by the movement of theoperating handle, for controlling the driving means, in order that thedirection of rotation of the spindle will be the same on a givendirection of movement of the operating handle, regardless of whetherdriving connection is made by the internal gear or the external gearabout the spindle.

It is the object of my invention, therefore, to provide means controlledby an operating part for effecting a similarity of direction of rotationof the drill-spindle by a given direction of movement of the operatingpart, regardless of whether the driving means has operative connectionwith the spindle by means of the internal gear or the external gear;further, to provide novel controlling means for the driving relationsfor the drillspindle, whereby a change in relation in the driving meansefi'ects a change in relation in the controlling means for effectingsimilarity in rotation of the spindle by given movements of theoperating part; further, to provide control means and driving means fora drill-spindle whereby shifting of an element of the driving meanscauses shifting of an element in the control means for changing thecontrol effect of the control means on the driving means.

The invention will be further readily understood fromv the followingdescription and claims, and from the drawings, in which latter:

Figure 1 is a front elevation of a drilling machine embodying myinvention.

Fig. '2 is a rear elevation of the same.

Fig. 3 is a plan view of the drill-head and drill-arm, partly brokenaway.

Fig. 4 is a horizontal plan section of the same, taken in the plane ofthe line 4-4 of Fig. 13. I

Fig. is a plan section of the same, taken in the plane of the line 5-5of Fig. 10.

Figr. 6 is a side elevation of my improved device. with part of thecasing removed for better illustration of parts.

Fig. I is a sectional detail oii one of the shifting handles, taken onthe line 7'? or Fig. 8 is an axial sectional detail of the shiftingmeans, taken in the plane of line 88 of Fig. 6.

Fig. 9 is an axial sectional detail of e shifting means, taken on theline 99 of Fig. 10 is a side elevation of my improved device, with thecasingpartly broken away i or better illustration of parts.

Fig. 11 is a plan section of the same, taken in the plane of the linei.lll of Fig. 10.

F ig. 12 is a cross-section of one of the driving clutches, taken inline 12-l2 of Fig. 11.

Fig. 13 is a vertical section or" my improved device, taken in the planeof the line 13-13 of Fig. 5.

Fig. 1 1- is a sectionaldetail o the control means, taken in the planeor the line 14-14 of Fig. 6; and,

Fig. 15 is a plan section of a detail of the same, taken in the plane ofthe line 15 of Fi 18.

My invention is exemplified in a radlal drill comprising a base 11, fromwhich a post 12 extends upwardly, a column 13, shown as a rotatablecolumn, being received about the post for positioning the drillarm 14 inradial position with relation to a table 15. (See Figs. 1 and 2.) Thedrillarm 14: comprises a bearing 16 about the column, and is arranged tobe raised and lowered on the column by means of a screw-rod 17,rotatable selectively in reverse directions by gearing 18 in the cap 19of the column, the latter gearing being rotatable by an upright shaft 20in the post, driven'by gearing 21, preferably at selective speeds, as bya step pulley 22, or other suitable means.

Reverse rotations are imparted to the screw-rod by means of selectiverelations in the gearing 18, etlected by a rocker-rod 23 suitablysupported on the column and 0p erated by a handle 24. A shaft 25 extendslengthwise of the column, and is arranged to be driven at selectivespeeds by upright shaft 20 by usual gearing 26 in the cap 19.

A cross-shaft 31 has a bevel-gear 32 fast thereon, which is meshed by abevel-gear 33, rot ring in a bearing 34 secured to the drillarm bearing,and having spline-connection 35 with upright shaft 25. The arm isarranged to be clamped in adjusted positions to the column by means ofclamps 37. The column is arranged to be clamped to the post when inadjusted position. by means of a clamp 38.

the plane oi the The cross-shaft 31 is arranged to rotate and to feedthe drill-spindle at selective speeds and in selective directions. (SeeFigs. 3, a, 5, 6, 10 and 11.) A sleeve 41 slides lengthwise of thecrossshaft and is rotatable therewith, having spline-connection 42 withsaid sleeve. The sleeve is journaled in bearings l3 in the casing H of adrill head 45. Upposed bevelgears E6, 47, are arranged to be selectivelyconnected with the sleeve, as by means of friction-clutches 18, 49, eachof which cornprises a friction-band 50, one end of which has lodgmentagainst a stop 51 on an inner member 52 01 the friction-clutch, theinner member being keyed by a key 53 to the sleeve.

A lever 56 is pivoted to the inner member and has a key 5'? thereonwhich engages the opposite end of the friction-band for expanding thesame, the engagement being caused by means of a cam-face 58 on a s1idingkey 59, the lever being normally retracted by a spring 60. (See Figs. 11and 12.) The sliding key is moved lengthwise in a groove 61 in thesleeve, by means of a collar 62 secured thereto, the collar beingarranged to be shifted laterally by means of a fork 63, received in anannular groove 64- in said collar, and secured to a rod 65 slida rearhousing 68 of the drill-head.

When the collar 62 and sliding key 59 are moved in one direction,operative connection is made between the cross-shaft 31 and thebevel-gear 4:6, and when the sliding key is moved in the oppositedirection, operative connection is made between said cross-shaft and thebevel-gear 47. When the collar and key are in intermediate positions,both said bevel-gears are at rest, the shaft and sleeve rotating idleWithin the same. A bevel-gear 71 is in mesh with both of said opposedbevel-gears 46, 47, for rotating the shaft 7 2 in opposite directions,depending on 'which of the bevel-gears 46, 4:7, is in 0perative relationwith its drive-shaft. (See Fig. 10.) The bevel-gear 71 is fast on aShaft 72 journaled in bearings73 of the drillhead, and is arranged totransmit motion preferably at a plurality of speeds to thedrill-spindle.

The drill-spindle is shown at 75, and is arranged to have a suitabledrill 76 received therein. (See Figs. 1, 3, a, 10 and 13.) Thedrill-spindle is exemplified as having an internal gear 77 and anexternal gear 7 8 received thereabout for driving the same, the internalgear being exemplified as having a bushing 79 extending therefrom, theexternal gear being secured to the bushing by a key 80. The bushing isrotatable in a bearing 81 on the drill-head. The spindle has axialmovement in the bushing and is caused to rotate therewith, as by aspline,

95 able lengthwise in bearings 66 in lugs 67 of i connection 82. Arack-sleeve 85 is received about the spindle, the spindle rotatingtherein, end-abutment bearings 86, 87, being'between the sleeve and thespindle. Thesleeve is provided with a, key 88 having length wisemovement ina groove 89 of a bearing: 90 in which the sleeve has axialmovement? The sleeve is provided with a rack 91,

which is meshed by a pinion 92, arranged to be rotated in suitablemanner, either for quick axial positioning movement of the" dle 97, theclamp being released when employing the handle, as mercifully describedin the aforesaid application. (See Figs. 5, 10 and 11.) 1 t The worm isarranged tobe rotated manually by a hand-wheel 101 fixed to a shaft 102,to which the worm is fixed, or bypower, by means of a shaft 103 journaled in a bearing 104 of the drill-head and in a bore 105 in theWorm-wheel, and arranged to be selectively connected with the worm bymeans of a clutch 106 operated by a handle 107.

The shaft 103 is arranged to be rotated at selective speeds by suitablecoacting nests of gears, exemplified at 108, the selective speeds inwhich are controlled by a hand-wheel 110. The variable speed device isarranged to be rotated by a gear 111, which meshes with a gear 112 fastwith the bushing 79.

Lateral movement of the drill-head on the arm in either direction iscaused by suitable means, as by having the drill-head slide laterally onguides 115 on the arm, effected by means of a rack 116, (see Figs. 1, 10and 11), extending lengthwise of the arm, meshed by a pinion 117, withwhich a gear 118 meshes,

' the latter being on a shaft 119. journaled in a bearing 120 in thedrill-head, and having a worm-wheel 121 fast thereon. The wormwheel ismeshed by a worm 122, on a shaft 123, journaled in the'drill-head,andhaving an operating hand-wheel 124 fixed thereto.

Suitable means are provided for driving the internally toothed andexternally toothed gear about the drill-spindle at selective speeds,exemplified as accomplished by means of a driving gear 131, arranged todrive the internal gear, andby means" of a driving gear132, arranged todrive the external gear about the spindle. (See Figs.'3, 4, 5, 6, 10 and13.) The driving gears are on-a sleeve 133, having spline-connection"134 with a:

shaft 135. The sleeve has bearing in a bushing 136. which hasspline-connection 137 with a bearing- 138 in the drill-head,'the gear orpinion 131 being arranged to be received in the latter bearing when thegear 132 is caused to mesh with the external gear 78 1 sides of its axisof rotation.

about the drill-spindle. Axial movement of the driving gears is effectedby means to be presently described.

, The driving gears are arranged to be roftated at selective speeds,effected by variable speed mechanism, instanced as-comprisin a pair ofspaced-apart'gears 141,142, fixe to the shaft 135. Gears 143, 144, areon a sleeve 145, which has spline-connection 146 with the shaft 72.

Selective driving connections between the shaft 135 and thedrill-spindle, and between shafts 135 and 72, are preferablyindependently controlled by mechanism adapted .to be manually actuated,(see Figs. 1, 3, 4, 5, 6, 7, 8, 9 and 10.) Instancing this arrangement,the axially movable sleeves 133, 145, of the respective selectivedriving connections, are

shifted axially by shifting forks 151, 152, received in suitable annulargrooves 153, 154,

formed in-,the sleeves 133, 145, respectively.- The shifting forks areexemplified as ex- 156, which are slidably mounted on guiderods 157,158, fixed in the drill-head.

'members and the shifting sleeves 155, 156.

preferably include racks 163, 164, on the shifting sleeves. andsector-gears 165, 166, fixed to the oscillating sleeve 159 and shaft 160respectively.

The sector-gears are arranged to actuate the racks of theshifting-sleeves, either by meshing directly with the racks, asexemplified by a gear 165 and rack 163, or through the medium of atransmitting pinion 167. interposed between and meshing with.the

tending laterally from shifting sleeves 155, p

sector-gear 166 and the rack 164, at opposite (See Fig. 10.) The shaft168 of the transmitting pinion is fixed a suitable bearing 169.

The oscillatory sleeve and shaft are preferably independently. partiallyrotated in either direction by rack-rods 171, 172. in-

stanced as provided with racks 173, 174. in

meshing engagement with sector-gears 175'.

176. fast upon the sleeve and shaft respec-' tively. (See Figs-5, 6, 8and 10.) The rackrods have guided axial movement in a housing 177. k

The rack-rods have lower racks 17 8. 179.

thereon, actuated by sector-gears 181. 182,

ating meshing engagement with racks 17%, 1'79, upon the rack-rods. (SeeFigs. 6 and 9.)

The sleeve 184.- is on a stud-shaft 186 joun' naled in a hearing 187 inthe frame, the sleeve being journaled in a bearing 188 or a cover-plate189, or the housing 177, in which said sleeves are received, the saidplate extending forwardly and having an indexplate 190 thereon. Thesleeve183 is journaled about the sleeve 181, and is held thereon bymeans of a collar 191 secured to the inner sleeve by a Screw 192. Thesector-gear 182 is on the collar 191.

An operating arm 194: extends from the sleeve 18%, and an operating arm195 extends from the sleeve 183, the operating arm 19 1- being receivedthrough a slot 196 insaid sleeve-box.

Each of the operating arms has an axially movable handle 201 thereon,(see also Fig. 7). The handle is provided with a positioning lug 202which is normally urged toward recesses 203 in the index-plate 190 by aspring 204, received in the bore 205 of said handle, between a shoulder206 on the opera,

ating arm and the bottom wall or said bore. A pin 207 received throughthe arm and in slots 208 in the handle prevents turning of the handle,for insuring coactive relation between the lugs and recesses, which actas stops for positioning the operating arms in the relation for causingcoaction between the gear elements of the variable speed and drivingmeans for the drill-spindle.

in operation, when the driving gear 131 is operatively connected withthe internal gear about the drill-spindle, a low speed ratio of rotationand feeding movement of the drill-spindle is obtained. If, on the otherhand, the driving gear 132 is caused to mesh with the external gear 78about the drillspindle, a high speed ratio of rotation and feedingmovement of the drill-spindle is ob tained. When the driving gear is inoperative relation with the external gear about the spindle, the largeinternal gear acts, a fiy-wheel efiect upon the spindle for insuringuniformity of rotation at the high speeds.

The low speed ratio of rotation and the high speed ratio of rotation ofthe spindle may be varied by means of the variable speed gearing.Excessive speeds in the variable speed gearing are avoided on account ofthe marked difference in speed of the spindle obtained respectively bythe external and internal gears. These various resultants or speed aretransmitted through the feed gearing into speeds of axial or feedingmovements of the spindle, the various speeds being multiplied by thevariable speed mechanism instanced in the feeding mechanism-Assuniing'that the driving gears 131, 132,

a given direction, the operative 1 naeaaev connection or the driving.means throu h said respective gears, respectively with t e internal nearand the external gear about the spindle, cause opposite rotations of thespindle.

It now the shifting lever for shifting the clutch-collar 62 isdirect-connected to said collar, as, in the aforesaid application,directions of movement of said shifting lever are required when thespindle is driven by means of? said internal gear, which are opposite tothe directions of movement or said shitting lever required when thespindle is driven by means of said external gear. It would be necessary,therefore, for the operator to have continually in mind which gear isperforming the driving of the spindle in order to know the properdirection of movement of the shifting lever for a given direction ofrotation of the spindle.

In order to avoid this opposite movement or the operating part foredectin a given direction of movement in the dril -spindle,

and to permit movement of the operating part in similar direction,regardless of whether the internal gear or external gear is driving thedrill-spindle, ll provide means actuated by a shiftable element ofthemechanism causing selective driving connection with the internal andexternal gears, said means having connection with a shiftable elementconcerned in therotations of said internal and external gears. In thepresent exemplification 1 provide the last-named shiitable element inthe control means, whereby the control means is reversely air"- fectedby the operating handle when the spindle is driven b means of one ofsaid gears than when riven by means of the other or said gears. v

Tnstancing this arrangement, the operating handle 211 is fixed to arocker-shaft 212,

having an operating sleeve 213 thereon, respectively journaled inbearings 214., 215, of the rearwardly extending housing 68 of thetool-slide casing. (See Figs. 1, 2, 5, 6, 10 and 13). The sleeve is heldagainst-endwrise movement in said bearings by means of a collar 216fixed thereon, and the hub of the operating handle.

Segment bevel-gears 219, 220, rock loosely about the sleeve. Abevel-gear 221 meshes at opposite sides with said bevel segment gears.The beveLgear 221 is fixed to a shaft 222, journaled in a bearing 223,in a stirrup 224:, extending from the lugs 6'? of said housing. A pinion225 is fixed to said shaft and meshes with a rack 226, on the fork 63,for shifting the clutch-collar 62 lengthwise oil the sleeve 41, forfixing eitherof the gears 46, 4:7, to said sleeve, for causing oppositerotations in the train of gearing connecting with the drill-spindle.

Connection is made between one of the Slllfil-blfi elements of the speedvarying gear 237 is on said lever and meshes with a.

circular rack 238, on an axially movable rod 239, having a key 240 fixedthereto. The key. 240 slides m a slot 241 extending lengthwise in thsleeve 213, and is arranged to selectively engage in key-slots 242, 243,in the respective segment bevel-gears 219, 220.

The sleeve 155 connects with the fork 151, which causes selectiveengagement of the driving gears with the internal gear and external gearabout the spindle, this movement being effected by the arm 194.

Assuming the relation shown in Figs. 6 and 10, the operating arm 194being in raised position, causes engagement of the driving pinion 131with the internal gear, as shown in Figs. 3 and-13, and rotation of thedrill-spindle in a given direction, resulting in a low speed ratio ofthe drill-spindle.

f now it is desired to change the rotation of the drill-spindle into ahigh speed ratio by operative connection with the external gearthereabout, the operating arm 194 is depressed, whereby the sleeves 133and 155 are caused to descend, causing rocking movement of the lever 233and raising of the axially movable rod 239, for disengaging the key fromthe key-slot 242 in the segment. bevel-gear 219, and causing engagementof said key with the key-slot 243 in the segment bevel-gear 220.

When now the operating handle 211 is moved to cause operative relationin either of the driving clutches 48, 49, a given movement of saidoperating handle, when the key 240 is in the key-slot 242, will causeaxial movement of the clutch-collar 62 in a direction opposite to thedirection of its movement caused by said given movement of the operatinghandle when said key240 is in engagement with the key-slot 243 in theopposed segment bevel-gear 220, so that said given direction ofoperation of the operating handle will effect the control means in suchmanner as to rotate the upright shaft 72 in opposite directions, whenthe driving gears 131, 132, are at their opposite limits-of axialmovement, for causing similarity of rotation in the dr ll-spindle, dueto the meshing of said oppositely rotating driving gears at oppositesides of their axes of rotation respectively with the mternal gear andthe external gear about the drill-spindle, for transmitting the oppositerotations of said drive-shaft into similar rotations at thedrill-spindle.

It will be noted that when the operating handle 211 is moved laterallyfor shifting elther of the segment bevel-gears 219, 220, about theiraxes of rotation, that the other of said segment bevel-gears will berotated in the opposite direction by means of the intermediatebevel-gear 221. The key-slots 242, 243, are in registry with thelongitudinal slot 241 in the sleeve 213, when the operating arm is inneutral-position, for

placing the driving gears 131, 132,'in neu-- tral position between theinternal gear and external gear about the spindle.

It is obvious that changes may be made in the present exemplification ofmy invention within the "sco e of the appended claims, without departingfrom the spirit of my invention.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent, is:

1. In a drilling machine, the combination of a drill-spindle, aninternal gear and an external gear about said drill-spindle for rotatingthe same, driving means, means selectively operatively connecting saiddriving means with said internal gear and said external gear, saidlast-named means including a shiftable member, a control member forcausing reversals of rotation in said driving means, and a shiftablemember with which said last-named shiftable member has operativeconnection whereby to reverse the control eflect of said control-memberin said reversals of rotation in said driving means.

2. In a drilling machine, the combination of a drill-spindle, feedingmeans for axially feeding the same, an, internal gear and an externalgear about said drill-spindle for rotating the same and actuating saidfeeding means,- means selectively operatively connecting said drivingmeans with said internal gear and said external gear, said last-namedmeans including a shiftable member, a control member for causingreversals of rotation in said driving means, and a shiftable member withwhich said last-named shiftable member has operative connection wherebyto reverse the control effect of said controlmember in said reversals ofrotation in said driving means.

3. In a drilling machine, the combination of a drill-spindle, aninternal gear and an external gear about said drill-spindle for vmentsfor changing the control sheet of said control means in said drivingmeans.

l. in a drilling machine, the combination or" a drill-spindle, feedingmeans for axially feeding the same, an internal gear and an externalgear about said drill-spindle for rotating the same and actuating saidfeeding means, driving means arranged for selective operative connecfionwith said internal gear and said external gear for rotating the same andincluding a shiftable element, a control means for the latter, saidcontrol means comprising a shiftable element, and means oneratively Iconnecting said shiftable elements whereby to reversethe control efiectof said control means.

5. in a drilling machine, the combination of a drillspindle, an externalgear and an internal gear about said drill-spindle for rotating thesame, driving means, means including a shiitable element torselectivelyoperatively connecting said driving means With said internal gear andsaid external gear, means causing reversals of movements in said drivingmeans, a control means for the latter, and means operatively connectingsaid shiftable element and said control means whereby toreverse thecontrol edect of said control means.

6. in a drilling machine, the combination of a drill-spindle, aninternal gear and an external gear about said drill-spindle for rotatingthe same, drive-gearing, means including a shiftable member forselectively operatively connecting said drive-gearing with said internalgear and said external gear, control means for the latter includingreversing gearing, said control means comprising a shiftable element,and connecting means between said shift-able elements for reversing theoperative effect of said reversing gearing. 7. In a drilling machine,the combination of a drill-spindle, means for rotating the same inreverse directions, control means for controlling the directions of saidreversals comprising a manually operating device, a reversing connectiontherefor for reversing the control effect of said control means, andmeans for automatically moving said reversing connection.

8. In a drilling machine, the combination of a drill-spindle, means forrotating the same in reverse directions including a shiftable element, amanually controlled member arranged for causing reversals in directionsof rotation of said drill-spindle, and means having connection with saidshiftable ele ment for automatically reversing the control efiects ofsaid manually controlled member upon said reversals in directions ofrotation of said drill-soindle.

9. In a drilling machine, the combination of a drilbepindle, means forrotating said drill-spindle, and plurality oi means each ins? reversingmeans upon said rotations of said causing reverse rotations of saiddrillspindle, said plurality of reversing means being interconnected forautomatically neutralizing the reversing efiect of one of saiddrill-spindle by movement in another of said reversing means.

10. in a drilling machine, the combination of a drill-spindle, means forrotating the same including a reversing driving means. manual means forcontrolling the reversals in said reversing driving means, and automaticmeans acting on said last-named means for reversing the control efi'ectby said lastnamed means.

11. in a drilling machine, the combination of a drill-spindle, aninternal gear and an external gear about said spindle for rotating thesame, driving means, a manual means for selectively causing operativeconnection of said driving means with said internal gear and saidexternal gear, reversing means in said driving means, a manual controlcausing reversals in said reversing means, and connecting means betweensaid firstnamed manual means and said manual control whereby to reversethe operative effect of said manual control on said reversing means insaid driving means.

12. In a drilling machine, the combination of a drill-spindle, aninternal ear and an external gear about said drill-splndle for rotatingthe same, manual means causing selective operative connection of saiddriving means with said internal gear and said ex- 10o ternal gear andincluding a shiftable element, said driving means including reversingmeans, a manual control for saidreversing means including a shiftableelement, and connecting means between said shift- 10 able elementswhereby said second-named shiitable element is automatically moved bysaid first-named shilta-ble element for reversing the control efiect ofsaid manual control on said reversing means of said driving 110 means.

13. In a drilling machine, the combination of a drill-spindle, means forrotating the same including a shiftable element, a driveshaft therefor,axially movable reyersing 115 means about said drive-shaft, a movablepart having connection therewith, a rocker-part operatively connectedwith the latter, a bevel-gear therefor, a manually operated 7 controlpart, a pair of bevel-gears operated thereby and meshing with saidfirst-named bevel-gear, and means connected with said first-namedshiftable element for selectively connecting said control part with thegears of said pair of bevel-gears.

14. In a drilling machine, the combination of a drill-spindle, aninternal gear and an external gear about said drill-spindle for rotatingthe same, driving means for said drill-spindle, a manually movable partfor 1180 selectively causing operative connection of said driving meanswith said internal gear andsaid external gear and comprising a shiftableelement, said driving means includ- V 5 ing reversing gearing, ashiftable part for causing reversals therein, a rack thereon, a

pinion in mesh with said rack, a bevel-gear rotating said pinion, anoperating arm, a rock-shaft operated thereby, a pair of bevelgearsthereabout meshing at opposite sides with said first-named bevelear, akey selectively connecting with sai pair of bevelgears, and akey-operating part having operative connection with said first-namedshiftable element.

15. Ina drilling machine, the combination of a drill-spindle, aninternal gear and an external gear about said drill-spindle for rotatingthe same, driving means, manual means for selectively operativelyconnecting said driving means with said internal gear and external earand including a I shiftable element, said driving means includingreversing gearing, an operating part therefor, a control-arm, a rockingsleeve actuated thereby, a pair of bevel-pinions about said sleeve, anaxially movable rod in said sleeve, a key thereon arranged toselectively connect with said bevel-gears, a bevel-gear between saidpair of bevel-gears for actuating said operating part, sald axiallymovable rod provided with a rack, said shiftable element provided with arack, and a lever pivoted intermediate of its ends and provided withteeth at its respective ends engaging said respective racks, whereby toautomatically shift said axially movable rod upon shifting of saidfirst-named shiftable element.

In. testimony whereof I have hereunto signed my name in the presence oftwo subscribing witnesses.

HERMAN W. SCI-IATZ.

Witnesses:

THERESA M. SILBER, DAWSON E. BRADLEY.

